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E90/E91/E92/E93 (2006 - 2013) The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

My car did the same a few times. At the time, shutting off the car and restarting fixed it, but I mentioned it to my dealer and they upgraded the programming of the car (yup....the whole ISTA programming) and it hasn't reoccurred.

I had that problem once or twice. Could be the battery, because I've noticed the battery light come on a few times. Just don't sit in the car without the engine on and playing music for a long time. I haven't had the issue for quite some time. ...yeah Apple OS would be sweet. I've always wanted to be able to control my iPod with the iDrive knob and steering controls... I hate plugging in my iPhone and then having to still use it to change songs.

edit: by the way, from time to time, when I start up, it will take about a minute before I can change XM stations or move the volume up/down, like there's a lag.

There is a post concerning this problem. You will have all the displays working but no soound, including no "Gong". It was suggested that there is a software problem and you have to get BMW to update the software. Shutting the car on and off sometimes does the trick, other guys are writing that turning the car on and off and locking and unlocking the car does the trick.

+1 on the software issue. It happend to me, no sound from anything. I was at the PCD to pick up and they updated the software in about hour. It hasn't been an issue since. They also loaned me (I'm local) a sweet 650 to pick my daughter up from school in. N4S

My car did the same a few times. At the time, shutting off the car and restarting fixed it, but I mentioned it to my dealer and they upgraded the programming of the car (yup....the whole ISTA programming) and it hasn't reoccurred.

Can anyone CONFIRM that reprogramming the car ACTUALLY fix the radio problem? If yes, can you post the details of the programming? My service advisor did not attempt to repair or reprogram the car, since I could not reproduce the problem.

BACKGROUND: I have EXACTLY THE SAME PROBLEM with my 2009 BMW 335d (US spec, Nov 2008 manufacture date). Sometime, there is NO SOUND coming from the radio. The radio seems to be ON (lights / buttons operate), but there is no sound. Restarting the car seems to fix the problem.

BTW, my radio get very HOT (at least when playing MP3 discs, the discs comes out very warm).

Exact same thing happened to me a bunch of times. Of course BMW says that if I can't reproduce it for them they can't fix it. Such crap. How do you reproduce a problem that happens haphazardly once every couple months. Of course they deny there's a known issue. But I've read a bunch of forums and a lot of people are having the same issue with their radio being on with no sound. Usually turning off the car and turning it back on will rectify the problem but last night nothing could fix it. When I left my car for the night the radio display would not turn off at all (but still no sound). Tried it the next morning and it's fine again. Ridiculous service from BMW as always.

Exact same thing happened to me a bunch of times. Of course BMW says that if I can't reproduce it for them they can't fix it. Such crap. How do you reproduce a problem that happens haphazardly once every couple months. Of course they deny there's a known issue. But I've read a bunch of forums and a lot of people are having the same issue with their radio being on with no sound. Usually turning off the car and turning it back on will rectify the problem but last night nothing could fix it. When I left my car for the night the radio display would not turn off at all (but still no sound). Tried it the next morning and it's fine again. Ridiculous service from BMW as always.

Had the same problem with my radio shortly after I got the car in 2009. I lived with it a while until the recall for the fuel pump for all 335's. At that time I told the dealer of the problem with the radio and said there was a service bulletin on the problem. I have not had a problem since.

I am having the same issue with my 2008 328i. this morning on the way to work everything working great.
on the way home I hear a buzzing crackling sounds coming from front passenger side speakers. The radio was working just fine but sounds was coming in and out.
Towards the end of my ride home sound changed to low buzzing noise on all the speakers and the radio and aux have no sound.
Everything lights up but have NO SOUND. Someone please help. I have a battery cord recall scheduled with dealer this Friday. Can this be part of the problem?
Any advise GREATLY appreciated. thanks